Question

calculate the momentum of a toy car of mass 300 g moving in a speed of 18 km/h

Answer 1

✔️Momentum  = Mass × Velocity

✔️Momentum = 0.3 kg × 18000m/3600s
     
✔️Momentum = 0.3 kg × 5 m/s

✔️Momentum = 1.5 kg × m/s

Answer 2

LINEAR MOMENTUM IS 1.5 kg m/s

Given:

• Mass = 300 g = 0.3 kg
• Speed = 18 km/hr

To find:

• Momentum of car ?

Calculation:

Let's convert the speed unit from km/hr to m/s:

$18 \: km/hr = 18 \times \dfrac{1000 \: m}{3600 \: sec} = 5 \: m/sec$

Now, linear momentum is a vector quantity whose magnitude is represented by the product of the mass and velocity of the object.

$P = m \times v$

$\implies P = 0.3 \times 5$

$\implies P =1.5 \: kg \: m/sec$

So, the linear momentum is 1.5 kg m/s